How To Install A Metal Roof Over Existing Shillk44

Installation of metal roofing over shingles.

How to install a metal roof over existing shillk44.

As long as the plywood under the shingle roof is in good condition this way can provide many benefits. But first here are a few precautions about the underlying material. Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath. If you choose to install metal roofing over shingles there are certain things you must keep in mind.

Use your 1 1 4. Address any existing roof leaks and replace rotten rafters or. 3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof. The low weight of metal roofing is one thing that encourages this.

Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. The edging or eave flashing consists of metal strips that are used to cover the perimeter of the roof. Install the roofing screws vertically along each rib in the panel. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.

Metal roofing materials are available in several styles that require different fastening applications but are most commonly screwed to the roof framing or sheathing material which in the case of installing over existing roofing material should be fastened using 2 1 2 inch screws. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life. Take your first sheet of.

We re going to break them down so you know what to look out for. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh.

Add the metal panels. Lay a metal roofing panel over the existing roof material in the bottom corner of the roof surface and fasten to the roof according to the metal panel instructions.